In the Beechgrove garden, Carole takes a look at and tastes both peas that are sweet and sweet peas. Carole has been running an observation on varieties of peas and their support systems, and it's time for harvest and analysis. George returns to his roots as he visits Athelstaneford village near North Berwick. Twelve village gardens are gearing up for an open day, and George takes a tour around as many gardens as he can. Jim visits Douneside House in Tarland to meet head gardener Stephen McCallum, who leads a progressive horticulture apprenticeship scheme in the stunning surroundings of Douneside House gardens.